426
FNCA52 TJSJ 181930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST SUN OCT 18 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-190800-
SOUTHEAST COASTAL PLAINS-
330 PM AST SUN OCT 18 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 30 30
TEMP (24H TREND) 73 (-3) 91 (+1) 73 90
RH % (24H TREND) 91 (+3) 52 (-5) 90 52
WIND 20FT/EARLY(MPH) E 5 E 9 E 9 E 10
WIND 20FT/LATE(MPH) NE 5 SE 10 NE 6 SE 10
MIXING HGT(FT-AGL/MSL) 4850 5060
TRANSPORT WND (MPH) E 7 E 9
VENT RATE (KT-FT) 29100 40480
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-190800-
SOUTHERN HILLS-
330 PM AST SUN OCT 18 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 50 60 20 50
TEMP (24H TREND) 70 (-3) 88 (+3) 70 88
RH % (24H TREND) 97 (+5) 61 (-6) 97 61
WIND 20FT/EARLY(MPH) E 5 E 6 E 6 E 8
WIND 20FT/LATE(MPH) E 5 SE 8 NE 5 SE 8
MIXING HGT(FT-AGL/MSL) 5350 5640
TRANSPORT WND (MPH) SE 7 SE 8
VENT RATE (KT-FT) 32100 39480
DISPERSION 5 5
DSI 1 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-190800-
NORTH COASTAL PLAINS-
330 PM AST SUN OCT 18 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 40 60 50 70
TEMP (24H TREND) 73 (-2) 90 (+1) 72 90
RH % (24H TREND) 96 (+2) 61 (-6) 97 60
WIND 20FT/EARLY(MPH) SE 6 E 8 SE 9 SE 9
WIND 20FT/LATE(MPH) LGT/VAR E 12 SE 5 E 11
MIXING HGT(FT-AGL/MSL) 4540 4840
TRANSPORT WND (MPH) E 7 SE 7
VENT RATE (KT-FT) 27240 29040
DISPERSION 5 5
DSI 2 6 3 5
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-190800-
NORTHERN HILLS-
330 PM AST SUN OCT 18 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 50 90 50 80
TEMP (24H TREND) 71 (-1) 89 (+1) 70 89
RH % (24H TREND) 96 (0) 62 (-4) 97 62
WIND 20FT/EARLY(MPH) SE 5 E 5 SE 6 SE 6
WIND 20FT/LATE(MPH) LGT/VAR NE 9 LGT/VAR NE 6
MIXING HGT(FT-AGL/MSL) 5020 5420
TRANSPORT WND (MPH) E 5 SE 6
VENT RATE (KT-FT) 20080 27100
DISPERSION 5 5
DSI 1 6 1 5
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-190800-
WEST COAST-
330 PM AST SUN OCT 18 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 40 70 40 50
TEMP (24H TREND) 73 (-1) 91 (+1) 73 91
RH % (24H TREND) 96 (+2) 61 (-4) 96 60
WIND 20FT/EARLY(MPH) E 6 E 6 E 6 SE 9
WIND 20FT/LATE(MPH) E 5 NE 8 E 6 S 10
MIXING HGT(FT-AGL/MSL) 4480 4530
TRANSPORT WND (MPH) SE 6 SE 6
VENT RATE (KT-FT) 22400 22650
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-190800-
EASTERN INTERIOR-
330 PM AST SUN OCT 18 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 30 50 50 70
TEMP (24H TREND) 71 (-3) 89 (+2) 71 89
RH % (24H TREND) 96 (+2) 60 (-5) 96 60
WIND 20FT/EARLY(MPH) SE 6 SE 6 SE 8 SE 9
WIND 20FT/LATE(MPH) SE 5 SE 11 SE 6 SE 10
MIXING HGT(FT-AGL/MSL) 5980 6000
TRANSPORT WND (MPH) SE 7 SE 8
VENT RATE (KT-FT) 35880 42000
DISPERSION 5 5
DSI 1 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-190800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST SUN OCT 18 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 40 60 60 60
TEMP (24H TREND) 70 (-3) 86 (+3) 70 86
RH % (24H TREND) 99 (+3) 63 (-7) 99 62
WIND 20FT/EARLY(MPH) SE 5 SE 6 SE 6 SE 9
WIND 20FT/LATE(MPH) LGT/VAR SE 9 LGT/VAR SE 9
MIXING HGT(FT-AGL/MSL) 4780 4570
TRANSPORT WND (MPH) SE 8 SE 9
VENT RATE (KT-FT) 33460 36560
DISPERSION 5 5
DSI 1 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-190800-
CENTRAL MOUNTAIN RANGE-
330 PM AST SUN OCT 18 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 60 100 40 80
TEMP (24H TREND) 68 (-3) 86 (+3) 68 86
RH % (24H TREND) 97 (+2) 64 (-7) 97 64
WIND 20FT/EARLY(MPH) SE 5 E 5 LGT/VAR SE 5
WIND 20FT/LATE(MPH) LGT/VAR SE 5 LGT/VAR SE 5
MIXING HGT(FT-AGL/MSL) 5920 6020
TRANSPORT WND (MPH) SE 6 SE 6
VENT RATE (KT-FT) 29600 30100
DISPERSION 5 5
DSI 1 5 1 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-190800-
CAYEY MOUNTAIN RANGE-
330 PM AST SUN OCT 18 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 30 50 50 50
TEMP (24H TREND) 70 (-2) 85 (+1) 70 85
RH % (24H TREND) 99 (+2) 63 (-5) 99 62
WIND 20FT/EARLY(MPH) LGT/VAR E 6 E 5 E 8
WIND 20FT/LATE(MPH) LGT/VAR SE 9 LGT/VAR SE 8
MIXING HGT(FT-AGL/MSL) 5590 5580
TRANSPORT WND (MPH) E 7 SE 9
VENT RATE (KT-FT) 33540 44640
DISPERSION 5 5
DSI 1 6 1 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-190800-
VIEQUES-
330 PM AST SUN OCT 18 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 50 40
TEMP (24H TREND) 78 (-1) 90 (+1) 76 90
RH % (24H TREND) 86 (+1) 58 (-4) 87 57
WIND 20FT/EARLY(MPH) E 9 E 8 E 10 E 9
WIND 20FT/LATE(MPH) E 8 SE 9 E 9 SE 9
MIXING HGT(FT-AGL/MSL) 3150 3080
TRANSPORT WND (MPH) E 9 SE 9
VENT RATE (KT-FT) 25200 24640
DISPERSION 5 5
DSI 5 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-190800-
CULEBRA-
330 PM AST SUN OCT 18 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 50 40
TEMP (24H TREND) 80 (-1) 89 (+1) 78 89
RH % (24H TREND) 85 (+2) 59 (-6) 86 59
WIND 20FT/EARLY(MPH) E 8 E 8 E 10 E 10
WIND 20FT/LATE(MPH) E 9 SE 9 E 9 SE 10
MIXING HGT(FT-AGL/MSL) 3300 3110
TRANSPORT WND (MPH) E 10 SE 12
VENT RATE (KT-FT) 29700 31100
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-190800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST SUN OCT 18 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 10 40
TEMP (24H TREND) 74 (-2) 92 (+2) 74 92
RH % (24H TREND) 93 (+5) 50 (-7) 90 52
WIND 20FT/EARLY(MPH) E 8 E 9 E 9 E 12
WIND 20FT/LATE(MPH) E 8 SE 11 E 9 SE 12
MIXING HGT(FT-AGL/MSL) 4780 4990
TRANSPORT WND (MPH) SE 9 SE 10
VENT RATE (KT-FT) 38240 44910
DISPERSION 5 5
DSI 3 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-190800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST SUN OCT 18 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 40 50 40 50
TEMP (24H TREND) 76 (-3) 87 (+1) 76 87
RH % (24H TREND) 89 (+4) 63 (-4) 88 63
WIND 20FT/EARLY(MPH) E 9 SE 9 E 10 E 10
WIND 20FT/LATE(MPH) E 9 SE 9 E 9 SE 10
MIXING HGT(FT-AGL/MSL) 3330 3260
TRANSPORT WND (MPH) E 12 SE 13
VENT RATE (KT-FT) 33300 35860
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-190800-
ST CROIX-
330 PM AST SUN OCT 18 2026
TONIGHT MON MON NIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 40 40 40 40
TEMP (24H TREND) 77 (-2) 89 (+1) 77 89
RH % (24H TREND) 91 (+3) 64 (-3) 90 63
WIND 20FT/EARLY(MPH) E 8 E 9 E 10 E 10
WIND 20FT/LATE(MPH) E 8 E 9 E 9 SE 10
MIXING HGT(FT-AGL/MSL) 4690 4630
TRANSPORT WND (MPH) E 10 SE 13
VENT RATE (KT-FT) 42210 50930
DISPERSION 5 5
DSI 5 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page